#1 2015-05-20 15:39:26

jars
Member
Registered: 2015-05-15
Posts: 29

How make Post to a Web Services that response with http code and Json

Hi, guys.
I´m developing with Delphi 7 and need to connect to a web services and make an http post with some parameters.
Can showme some example of use?
Thanks in advance

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#2 2015-05-20 19:38:57

ab
Administrator
From: France
Registered: 2010-06-21
Posts: 14,661
Website

Re: How make Post to a Web Services that response with http code and Json

Which Web Service?

For simple REST client using some of our units, see http://stackoverflow.com/a/22078557/458259

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#3 2015-05-21 14:24:12

jars
Member
Registered: 2015-05-15
Posts: 29

Re: How make Post to a Web Services that response with http code and Json

Thanks for the example, this is what I need.
This post has a response with a json object, how can I get this response?
Sorry I'd never worked with web services.

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#4 2015-05-21 14:29:34

ab
Administrator
From: France
Registered: 2010-06-21
Posts: 14,661
Website

Re: How make Post to a Web Services that response with http code and Json

TWinHttp.Post() returns a string.
Just pass it into a TDocVariant:

uses SynCrtSock, SynCommons;
var t,resp: variant;
begin
  TDocVariant.New(t);
  t.name := 'john';
  t.year := 1982;
  resp := _JsonFast(TWinHTTP.Post('http://servername/resourcename',t,'Content-Type: application/json'));
  if resp.firstname='John' then
    ....
end;

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#5 2015-05-21 14:35:32

jars
Member
Registered: 2015-05-15
Posts: 29

Re: How make Post to a Web Services that response with http code and Json

Many thanks for your kuicly response, it´s all i need for now.

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#6 2015-05-25 14:26:21

edwinsn
Member
Registered: 2010-07-02
Posts: 1,218

Re: How make Post to a Web Services that response with http code and Json

Hi Arnaud,

Looks like TWinHTTP includes all functionalities needed to implement a generic REST client?


Delphi XE4 Pro on Windows 7 64bit.
Lazarus trunk built with fpcupdelux on Windows with cross-compile for Linux 64bit.

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#7 2015-05-25 14:47:40

ab
Administrator
From: France
Registered: 2010-06-21
Posts: 14,661
Website

Re: How make Post to a Web Services that response with http code and Json

Yes, it is a brand full HTTP client access.

If you add TDocVariant/TDocVariantData for JSON support, you should have all you need.

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#8 2015-05-25 19:59:34

Junior/RO
Member
Registered: 2011-05-13
Posts: 210

Re: How make Post to a Web Services that response with http code and Json

What if I post a flac audio file (or stream) for the google Speech Api? TDocVarient will handle this?

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#9 2015-05-26 05:09:21

ab
Administrator
From: France
Registered: 2010-06-21
Posts: 14,661
Website

Re: How make Post to a Web Services that response with http code and Json

No here you use RawByteString, with the proper mime type specified in the HTTP headers.

TDocVariant is for json content.

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